Touch device and touch signal detection method

Abstract

The invention relates to a touch device and a touch signal detection method. The touch device comprises a processor and a touch sensor, wherein the touch sensor comprises 2N electrodes; the 2N electrodes are arranged around a central axis in a preset direction; the 2N electrodes are connected with each other at an interval of one electrode so as to form an emitting electrode and a receiving electrode; the emitting electrode and the receiving electrode are respectively connected with the processor; the processor is used for detecting an output signal of the receiving electrode in a first stage and detecting an output signal of the reference electrode in a second stage respectively so as to obtain a first touch semaphore which is presented as a mutual capacitance semaphore between the emitting electrode and the receiving electrode and a second touch semaphore which is presented as a self-capacitance semaphore of the 2N electrodes respectively; a trigger source of the touch signal is determined based on the first touch semaphore and the second touch semaphore. By adopting the touch equipment, the trigger source of the touch signal can be accurately determined on the basis of the touch sensor with a specific structure.

Description

Technical Field

[0001] The present application relates to the field of touch recognition technology, and in particular to a touch device and a touch signal detection method. Background Art

[0002] Capacitive touch buttons, which detect changes in the capacitance of electrodes to determine if a finger is touching them, have become a common user interaction device. Compared to traditional mechanical buttons, capacitive touch buttons offer many advantages, including attractive appearance, low cost, low power consumption, and long life. Consequently, demand for these buttons is steadily increasing.

[0003] However, when using capacitive touch buttons, if there are conductive liquids such as water droplets above the capacitive touch buttons, these conductive liquids will also change the capacitance of the electrodes. Obviously, when there is conductive liquid above the capacitive touch buttons, if it is impossible to accurately determine whether the trigger source of the touch signal is the conductive liquid or the human body, the capacitive touch buttons will be accidentally touched. Summary of the Invention

[0004] Based on this, it is necessary to provide a touch device and a touch signal detection method that can accurately determine the trigger source of a touch signal.

[0005] In a first aspect, the present application provides a touch device. The touch device includes a processor and a touch sensor, wherein the touch sensor includes 2N electrodes; the 2N electrodes are arranged around a central axis in a preset direction; the electrodes separated by one electrode in the 2N electrodes are connected to each other to form an emitter and a receiver; the emitter and the receiver are respectively connected to the processor; N is an integer greater than 1;

[0006] A processor, configured to generate a coding signal;

[0007] The processor is further configured to input the coding signal to the transmitter in the first stage, detect the output signal of the receiver, and obtain the first touch signal amount;

[0008] The processor is further configured to input the coding signal into the emitter and / or the receiver in the second stage, detect the output signal of the reference electrode, and obtain a second touch signal; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor;

[0009] The processor is further configured to determine a trigger source of a touch signal acting on the touch sensor based on the first touch signal amount and the second touch signal amount.

[0010] Second aspect, the present application provides a touch signal detection method. The touch sensor includes 2N electrodes; the 2N electrodes are arranged around the central axis in a preset direction; the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver; N is an integer greater than 1; the method includes:

[0011] Generate a coding signal;

[0012] In the first stage, input the coding signal to the emitter, and detect the output signal of the receiver to obtain the first touch signal quantity;

[0013] In the second stage, input the coding signal to the emitter and / or the receiver, and detect the output signal of the reference electrode to obtain the second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor;

[0014] Based on the first touch signal quantity and the second touch signal quantity, determine the trigger source of the touch signal acting on the touch sensor.

[0015] For the above touch device and touch signal detection method, the touch device includes a processor and a touch sensor. Among the 2N electrodes included in the touch sensor, the 2N electrodes are arranged around the central axis in a preset direction, and the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver. Moreover, the processor is used to detect the output signal of the receiver in the first stage and the output signal of the reference electrode in the second stage respectively to obtain the first touch signal quantity and the second touch signal quantity. Based on this, since the touch sensor has a specific structure, the first touch signal quantity at this time is the mutual capacitance signal quantity between the emitter and the receiver, and the second touch signal quantity is the self-capacitance signal quantity of the 2N electrodes. Thus, because the electrical characteristics of different trigger sources are different and correspond to different mutual capacitance signal quantity situations, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a touch device provided by an embodiment of the present application;

[0018] Figure 2 It is a schematic curve diagram of the touch signal quantity in a case of a trigger source provided by an embodiment of the present application;

[0019] Figure 3 It is a schematic diagram of the curve of the touch signal quantity under another trigger source provided in the embodiment of the present application;

[0020] Figure 4 It is a schematic flow diagram of a touch signal detection method provided in the embodiment of the present application. Detailed implementation manners

[0021] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and comprehensive.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0023] It can be understood that the terms "first", "second", etc. used in the present application can be used herein to describe various objects, but these objects are not limited by these terms. These terms are only used to distinguish the first object from another object. For example, without departing from the scope of the present application, the first touch signal quantity can be referred to as the second touch signal quantity, and similarly, the second touch signal quantity can be referred to as the first touch signal quantity. Both the first touch signal quantity and the second touch signal quantity are touch signal quantities, but they are not the same touch signal quantity.

[0024] It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is an electrical signal or data transfer between the connected circuits, modules, units, etc.

[0025] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element.

[0026] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "include" or "have", etc. specify the existence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the existence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0027] This application is made by the inventor based on the understanding and research of the following problems:

[0028] During the use of a capacitive touch button, if there are conductive liquids such as water droplets above the capacitive touch button, these conductive liquids will also change the capacitance of the electrodes. Currently, most capacitive touch buttons use the single self-capacitance mode for touch signal detection. Whether it is finger touch coverage or conductive liquid coverage, it will increase the self-capacitance signal of the capacitive touch button operating in the single self-capacitance mode.

[0029] Obviously, for the current capacitive touch buttons, it is difficult to accurately distinguish from the change in signal volume whether the trigger source of the touch signal is the human body or a conductive liquid. Therefore, when there is a conductive liquid above the capacitive touch button, it is easy to cause mis-touch phenomena. Based on this, this application proposes a touch device that enables the electrodes to detect touch signals in the mutual capacitance mode.

[0030] As Figure 1 shown, a touch device in an embodiment includes a processor 102 and a touch sensor 104. The touch sensor 104 includes 2N electrodes 1042; the 2N electrodes 1042 are arranged around the central axis in a preset direction; the electrodes 1042 separated by one electrode 1042 among the 2N electrodes 1042 are connected to each other to form a transmitting electrode 106 and a receiving electrode 108; the transmitting electrode 106 and the receiving electrode 108 are respectively connected to the processor 102; N is an integer greater than 1.

[0031] The processor 102 is used to generate a coding signal.

[0032] The processor 102 is further used to input the coding signal to the transmitting electrode 106 in the first stage, detect the output signal of the receiving electrode 108, and obtain a first touch signal volume.

[0033] The processor 102 is further used to input the coding signal to the transmitting electrode 106 and / or the receiving electrode 108 in the second stage, detect the output signal of the reference electrode 110, and obtain a second touch signal volume; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor 104.

[0034] The processor 102 is further used to determine the trigger source of the touch signal acting on the touch sensor 104 based on the first touch signal volume and the second touch signal volume.

[0035] A touch device refers to an electronic device that can detect changes in touch signal intensity when a human body or a conductive object contacts or approaches its surface, and converts these changes in touch signal intensity, which are presented as electrical signals, into touch signal intensity, which are presented as digital signals, to enable interactive input. Specifically, the changes in touch signal intensity refer to changes in capacitance.

[0036] Touch sensor 104 refers to a device within a touch device that detects changes in touch signal intensity when a person or conductive object contacts or approaches its surface, and transmits these changes to processor 102 within the touch device. In other words, touch sensor 104 is a key component within a touch device for sensing touch signals. Optionally, touch sensor 104 may be a quadrilateral sensor.

[0037] The touch signal refers to a change in capacitance caused by a touch operation, and the change in capacitance can be processed by the processor 102 and represented as an electrical signal of a touch event.

[0038] The electrode 1042 refers to a conductive component in the touch device that is used to generate a change in the amount of the touch signal under the action of the coding signal and the touch signal.

[0039] Optionally, the electrode 1042 may be made of indium tin oxide, graphene, copper or other conductive materials.

[0040] The 2N electrodes 1042 are arranged around a central axis in a predetermined direction. This means that the 2N electrodes 1042 are arranged in a predetermined direction with the central axis as the center. For example, the arrangement may be circular, elliptical, or other symmetrical shapes. The 2N electrodes 1042 may be evenly or unevenly distributed around the central axis.

[0041] For example, when 2N electrodes 1042 are arranged in a circle, the 2N electrodes 1042 can be arranged in a circle, in which case the central axis is the center of the circle, and the 2N electrodes 1042 are evenly or unevenly distributed on the circumference to form a circular array; when the 2N electrodes 1042 are arranged in an ellipse, the 2N electrodes 1042 can be arranged in an ellipse, in which case the central axis is the major axis or minor axis of the ellipse, and the 2N electrodes 1042 are evenly or unevenly distributed on the circumference of the ellipse to form an elliptical array.

[0042] The electrodes 1042 that are separated by one electrode 1042 in the 2N electrodes 1042 are connected to each other, which means that there is no connection relationship between adjacent electrodes 1042 in the 2N electrodes 1042. Instead, two or more electrodes 1042 with an electrode 1042 between them are connected for every electrode 1042 separated in the 2N electrodes 1042.

[0043] Exemplarily, assume that the touch sensor 104 is formed by arranging 4 right-angled sector electrodes 1042 in a circular shape. The 4 electrodes 1042 are respectively electrode 10421, electrode 10422, electrode 10423, and electrode 10424. According to the rule of "connecting the electrodes 1042 that are separated by one electrode 1042 from each other", electrode 10421 and electrode 10423 are connected to form an electrode 1042 group, and electrode 10422 and electrode 10424 are connected to form an electrode 1042 group, obtaining two electrode 1042 groups which respectively form the emitter 106 and the receiver 108.

[0044] Since the emitter 106 and the receiver 108 are respectively formed by connecting the electrodes 1042 that are separated by one electrode 1042 among 2N electrodes 1042, therefore, the emitter 106 includes N electrodes 1042 among the 2N electrodes 1042 and the receiver 108 includes the other N electrodes 1042 among the 2N electrodes 1042.

[0045] Specifically, the touch sensor 104 is respectively formed with the emitter 106 and the receiver 108 in order to be able to generate a first touch signal quantity presented as a mutual capacitance signal quantity based on the coding signal and the touch signal; and the connection of the electrodes 1042 that are separated by one electrode 1042 among 2N electrodes 1042 is to ensure that no matter where the human touch signal covers on the touch sensor 104, it can cover both the emitter 106 and the receiver 108 at the same time, so as to avoid the situation where the emitter 106 and the receiver 108 cannot be covered simultaneously, resulting in the inability to generate a mutual capacitance signal quantity and the inability to distinguish the trigger source of the touch signal.

[0046] The processor 102 refers to a device in the touch device that configures the working mode of the touch sensor 104, detects the change situation of the touch signal quantity from the touch sensor 104, and converts the touch signal quantity change situation presented in the form of an electrical signal into a touch signal quantity presented in the form of a digital signal. Specifically, in this embodiment, the processor 102 is used to configure the emitter 106 and the receiver 108 of the touch sensor 104 into a mutual capacitance working mode in the first stage of the detection period, and configure the 2N electrodes 1042 of the touch sensor 104 into a self-capacitance working mode in the second stage of the detection period. Thus, the first touch signal quantity is a mutual capacitance signal quantity and the second touch signal quantity is a self-capacitance signal quantity.

[0047] Optionally, the processor 102 can be a capacitance acquisition chip.

[0048] The first coding signal refers to a coded electrical signal of a certain frequency input by the processor 102 to the emitter 106 in the first stage (exemplarily, a pulse sequence, a sine wave, etc.) for forming an excitation electric field in the touch sensor 104, so that the receiving electrode 108 can detect the change in the mutual capacitance between the emitter 106 and the receiving electrode 108 based on the excitation electric field and the touch signal to obtain a first output signal. Thus, the processor 102 can detect the first output signal of the receiving electrode 108 to obtain a first touch signal quantity.

[0049] The second coding signal refers to a coded electrical signal of a certain frequency input by the processor 102 to the emitter 106 and / or the receiving electrode 108 in the second stage (exemplarily, a pulse sequence, a sine wave, etc.) for forming an excitation electric field in the touch sensor 104, so that the reference electrode 110 can detect the change in the self-capacitance of 2N electrodes 1042 based on the excitation electric field and the touch signal to obtain a second output signal. Thus, the processor 102 can detect the second output signal of the reference electrode 110 to obtain a second touch signal quantity.

[0050] Optionally, the frequency of the coding signal in the first stage and the frequency of the coding signal in the second stage can be the same.

[0051] The first touch signal quantity is the result of all the mutual capacitance signal quantities generated by N electrodes 1042 in the emitter 106 and N electrodes 1042 in the receiving electrode 108 of the entire touch sensor 104; the second touch signal quantity is the result of all the self-capacitance signal quantities generated by 2N electrodes 1042 of the entire touch sensor 104. That is to say, the first touch signal quantity and the second touch signal quantity respectively correspond to the entire touch sensor 104.

[0052] It should be noted that in the first touch signal quantity, although it also includes the self-capacitance signal quantities of 2N electrodes 1042, at this time, since the emitter 106 and the receiving electrode 108 in the touch sensor 104 work in the mutual capacitance mode under the action of the coding signal, thus, the first touch signal quantity obtained at this time is basically dominated by the mutual capacitance signal quantity. Therefore, the self-capacitance signal quantities of 2N electrodes 1042 in the first touch signal quantity can be ignored. That is to say, the first touch signal quantity can be regarded as the mutual capacitance signal quantity between the emitter 106 and the receiving electrode 108 in the first stage.

[0053] The detection period refers to the time required for the touch sensor 104 to cyclically detect the capacitance values of 2N electrodes 1042 at fixed time intervals in a complete process. The shorter the detection period, the faster the touch device can determine the trigger source of the touch signal. Conversely, the longer the detection period, the slower the touch device can determine the trigger source of the touch signal. Therefore, there is a negative correlation between the length of the detection period and the speed at which the touch device determines the trigger source of the touch signal.

[0054] Optionally, the detection period can be 20ms, 30ms, 50ms or other time values.

[0055] Optionally, the time lengths of the first stage and the second stage can be the same or different.

[0056] The trigger source of the touch signal refers to the physical factor that causes capacitance changes in the 2N electrodes 1042 of the touch sensor 104, that is, the source of the touch signal.

[0057] Optionally, the trigger source of the touch signal can include the human body and conductive liquids. Optionally, the human body can be a person's finger. Optionally, the conductive liquid can be water, electrolyte solution or other conductive liquids.

[0058] Specifically, for the same trigger source of the touch signal, the mutual capacitance signal amount between the emitter 106 and the receiver 108 is different from the self-capacitance signal amount of the 2N electrodes 1042. Further, due to the different electrical characteristics of different trigger sources of the touch signal, the processor 102 can accurately determine the trigger source of the touch signal based on the difference between the first touch signal amount presented as the mutual capacitance signal amount and the second touch signal amount presented as the self-capacitance signal amount.

[0059] Optionally, after the processor 102 determines the trigger source of the touch signal acting on the touch sensor 104, the processor 102 can also determine whether to respond to the touch signal based on the trigger source of the touch signal. Exemplarily, when the trigger source of the touch signal includes the human body, the touch signal is responded to. Conversely, when the trigger source of the touch signal is a conductive liquid, the touch signal is not responded to avoid false touch phenomena.

[0060] In an exemplary embodiment, after the processor 102 inputs the coding signal to the emitter 106 in the first stage, the touch sensor 104 is used to detect the capacitance change amount caused by the touch signal through the receiver 108 based on the coding signal, and obtain the first output signal of the receiver 108, so that the processor 102 detects the first output signal of the receiver 108 to obtain the first touch signal amount.

[0061] In an exemplary embodiment, after the processor 102 inputs the coding signal to the emitter 106 and / or the receiver 108 in the second stage, the touch sensor 104 is configured to detect the capacitance change amount caused by the touch signal through the reference electrode 110 based on the coding signal, so as to obtain the second output signal of the receiver 108, such that the processor 102 detects the second output signal of the reference electrode 110 to obtain the second touch signal amount.

[0062] Wherein, the reference electrode 110 refers to the component in the touch sensor 104 for detecting the self-capacitance signal amount, and the reference electrode 110 is connected to the processor 102.

[0063] Optionally, the reference electrode 110 may be formed by connecting 2N electrodes 1042 together.

[0064] The above touch device includes a processor and a touch sensor. Among the 2N electrodes included in the touch sensor, the 2N electrodes are arranged around the central axis in a preset direction. The electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver. Moreover, the processor is configured to detect the output signal of the receiver in the first stage and the output signal of the reference electrode in the second stage respectively, so as to obtain the first touch signal amount and the second touch signal amount respectively. Based on this, since the touch sensor has a specific structure, the first touch signal amount at this time is the mutual capacitance signal amount between the emitter and the receiver, and the second touch signal amount is the self-capacitance signal amount of the 2N electrodes. Thus, because the electrical characteristics of different trigger sources are different and correspond to different mutual capacitance signal amount situations, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal amount and the second touch signal amount.

[0065] In an exemplary embodiment, the 2N electrodes form a circular pattern or an oval pattern.

[0066] In an exemplary embodiment, the 2N electrodes are evenly arranged around the central axis in a preset direction.

[0067] Wherein, in the case where the 2N electrodes form a circular pattern and the 2N electrodes are evenly arranged around the central axis in a preset direction, each electrode is a sector electrode, and the central angle of each electrode = 360° / (2N).

[0068] Exemplarily, when N = 2, the touch sensor is composed of 4 sector electrodes with a central angle of 90°; when N = 4, the touch sensor is composed of 8 sector electrodes with a central angle of 45°.

[0069] In an exemplary embodiment, as Figure 1As shown, the distance D between adjacent electrodes is the same, and the ratio of the distance D to the diameter of the touch sensor is 0.05 to 0.15.

[0070] Among them, the diameter of the touch sensor can be 13.5 mm to 15.5 mm. Then, when the ratio of the distance D to the diameter of the touch sensor is 0.05 to 0.15, the distance D between adjacent electrodes can be 0.675 mm to 0.153 mm.

[0071] In an exemplary embodiment, N is 2.

[0072] In an exemplary embodiment, the touch sensor further includes a circuit board and a packaging layer; 2N electrodes are located between the circuit board and the packaging layer.

[0073] Among them, the packaging layer refers to the protective layer on the side of the 2N electrodes in the touch sensor close to the touch signal. The packaging layer is used to protect the touch sensor from the influence of the external environment. At the same time, it allows users to initiate touch signals to the touch sensor through the packaging layer.

[0074] Optionally, the packaging layer can be made of glass, plastic, acrylic board or other transparent materials.

[0075] The circuit board is located on the side of the 2N electrodes away from the touch signal. The circuit board is a key component in the touch sensor for converting the touch signal from an analog signal into an electrical signal that can be detected and analyzed.

[0076] Optionally, the reference electrode of the touch sensor can be located at the bottom of the circuit board on the side away from the touch signal.

[0077] In an exemplary embodiment, the processor is used to determine that the trigger source of the touch signal acting on the touch sensor includes the human body when the first touch signal amount is greater than the second touch signal amount.

[0078] In an exemplary embodiment, the processor is used to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal amount is less than the second touch signal amount.

[0079] Among them, the trigger source of the touch signal including the human body can also include a conductive liquid. When the first touch signal amount is greater than the second touch signal amount, whether the trigger source of the touch signal is only the human body or includes both the human body and the conductive liquid, the first touch signal amount is greater than the second touch signal amount. Therefore, in this case, it is only necessary to be able to determine that the first touch signal amount is greater than the second touch signal amount to determine that the trigger source of the touch signal must include the human body.

[0080] Specifically, regardless of whether the coding signal is a high-frequency coding signal or a low-frequency coding signal, and regardless of whether the trigger source of the touch signal is only the human body or includes both the human body and a conductive liquid, the first touch signal amount is greater than the second touch signal amount.

[0081] Specifically, since both the human body and the conductive liquid have conductivity, thus, the mutual capacitance signal amount generated when the trigger source of the touch signal includes both the human body and the conductive liquid will be greater than the mutual capacitance signal amount generated when the trigger source of the touch signal is only the human body. Furthermore, it can be ensured that when the first touch signal amount is greater than the second touch signal amount, the trigger source of the touch signal must include the human body.

[0082] Exemplarily, taking the time node on the time axis as the abscissa and the touch signal amount as the ordinate, in the case of using the touch device provided by the embodiment of the present application, which includes a touch sensor with a specific structure, as Figure 2 shown, when the touch signal with only the human body as the trigger source acts on the touch sensor, the touch signal amount of the emitter and the receiver of the touch sensor operating in the mutual capacitance mode is greater than the touch signal amount of the 2N electrodes of the touch sensor operating in the self-capacitance mode; as Figure 3 shown, when the touch signal with only the conductive liquid as the trigger source acts on the touch sensor, the touch signal amount of the emitter and the receiver of the touch sensor operating in the mutual capacitance mode is less than the touch signal amount of the 2N electrodes of the touch sensor operating in the self-capacitance mode. Based on this, due to the different electrical characteristics of the human body and the conductive liquid, in the case where the touch sensor can configure different electrode operating modes at different stages to obtain different touch signal amounts based on different trigger sources, the touch device provided by the present application can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal amount and the second touch signal amount.

[0083] Specifically, since the conductivity of the human body is stronger than that of the conductive liquid, and at the same time, since the trigger source with stronger conductivity will correspond to a larger touch signal amount, and the signal amount gap between the mutual capacitance signal amount and the self-capacitance signal amount of the trigger source with stronger conductivity will be larger. Based on this, when the trigger source includes the human body, due to the strong conductivity of the human body, the mutual capacitance signal amount will be greater than the self-capacitance signal amount, that is to say, the first touch signal amount presented as the mutual capacitance signal amount is greater than the second touch signal amount presented as the self-capacitance signal amount; conversely, when the trigger source is the conductive liquid, since the conductivity of the conductive liquid is weaker than that of the human body, the mutual capacitance signal amount will be smaller, and the smaller mutual capacitance signal amount cannot offset the self-capacitance signal amount existing in the 2N electrodes themselves. Thus, when the trigger source is the conductive liquid, the self-capacitance signal amount will be greater than the mutual capacitance signal amount, that is to say, the first touch signal amount presented as the mutual capacitance signal amount is less than the second touch signal amount presented as the self-capacitance signal amount.

[0084] Since a larger cypher signal frequency corresponds to a larger mutual capacitance signal amount, when the frequency of the first cypher signal is greater than that of the second cypher signal, the processor can determine that the trigger source of the touch signal includes a human body when the first touch signal amount is greater than the second touch signal amount. Conversely, when the first touch signal amount is less than the second touch signal amount, the processor can determine that the trigger source of the touch signal is a conductive liquid. Thus, the touch device can accurately determine the trigger source of the touch signal based on the first touch signal amount and the second touch signal amount.

[0085] In an exemplary embodiment, the processor is configured to determine that the trigger source of the touch signal acting on the touch sensor includes a human body when the first touch signal amount is greater than the second touch signal amount and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to a first threshold.

[0086] In an exemplary embodiment, the processor is configured to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal amount is less than the second touch signal amount and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to a second threshold.

[0087] The preset threshold can be pre-set in the processor. The preset threshold is related to the configuration parameters of the processor for the touch sensor. Exemplarily, if the configuration mode of the touch sensor has a relatively large touch signal amount, the preset threshold needs to be set to a relatively large value accordingly.

[0088] The first stage and the second stage of the processor can be interchanged. During the interchange process, it is necessary to ensure that the transmission object of the cypher signal also needs to be switched according to the working mode of the touch sensor. Specifically, when the processor configures the first stage of the touch sensor as the mutual capacitance working mode between the emitter and the receiver, the processor configures the second stage of the touch sensor as the self-capacitance working mode of 2N electrodes. Conversely, when the processor configures the first stage of the touch sensor as the self-capacitance working mode of 2N electrodes, the processor configures the second stage of the touch sensor as the mutual capacitance working mode between the emitter and the receiver. Based on this, in the case where the first stage is the self-capacitance working mode of 2N electrodes and the second stage is the mutual capacitance working mode between the emitter and the receiver, in an exemplary embodiment, the above-mentioned processor is configured to determine that the trigger source of the touch signal is a conductive liquid when the first touch signal amount is less than the second touch signal amount; and determine that the trigger source of the touch signal includes a human body when the first touch signal amount is greater than the second touch signal amount.

[0089] It can be understood that the above touch device can also adopt other forms, not limited to the forms already mentioned in the above embodiments, as long as it can achieve the function of accurately determining the trigger source of the touch signal.

[0090] The above touch device can be various personal computers, laptops, smartphones, tablets, Internet of Things devices, portable wearable devices, game devices or other devices with touch functions.

[0091] Based on the same inventive concept, an embodiment of the present application also provides a touch signal detection method, which is applied to a touch device. The touch device includes a touch sensor, and the touch sensor includes 2N electrodes; the 2N electrodes are arranged around the central axis in a preset direction; the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver; N is an integer greater than 1; as Figure 4 shown, the method includes the following steps 402 to 408:

[0092] 402, Generate a coding signal.

[0093] 404, In the first stage, input the coding signal to the emitter, and detect the output signal of the receiver to obtain the first touch signal quantity.

[0094] 406, In the second stage, input the coding signal to the emitter and / or the receiver, and detect the output signal of the reference electrode to obtain the second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor.

[0095] 408, Based on the first touch signal quantity and the second touch signal quantity, determine the trigger source of the touch signal acting on the touch sensor.

[0096] The above touch signal detection method is applied to a touch device including a touch sensor. Among the 2N electrodes included in the touch sensor, the 2N electrodes are arranged around the central axis in a preset direction, and the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver. And the method is used to detect the output signal of the receiver in the first stage and the output signal of the reference electrode in the second stage respectively to obtain the first touch signal quantity and the second touch signal quantity respectively. Based on this, because the touch sensor has a specific structure, the first touch signal quantity at this time is the mutual capacitance signal quantity between the emitter and the receiver, and the second touch signal quantity is the self-capacitance signal quantity of the 2N electrodes. Thus, because the electrical characteristics of different trigger sources are different and correspond to different mutual capacitance signal quantity situations, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

[0097] It should be noted that the implementation solution provided by the touch signal detection method for solving problems is similar to the implementation solution described in the above touch device. Therefore, the specific limitations in one or more embodiments of the touch signal detection method provided above can be referred to the limitations on the touch device in the above text, and will not be repeated here.

[0098] In an exemplary embodiment, based on the first touch signal amount and the second touch signal amount, determining the trigger source of the touch signal acting on the touch sensor includes:

[0099] When the first touch signal amount is greater than the second touch signal amount, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body.

[0100] When the first touch signal amount is less than the second touch signal amount, it is determined that the trigger source of the touch signal acting on the touch sensor is a conductive liquid.

[0101] In an exemplary embodiment, when the first touch signal amount is greater than the second touch signal amount, determining that the trigger source of the touch signal acting on the touch sensor includes the human body includes:

[0102] When the first touch signal amount is greater than the second touch signal amount, and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to the first threshold, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body.

[0103] When the first touch signal amount is less than the second touch signal amount, determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid includes:

[0104] When the first touch signal amount is less than the second touch signal amount, and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to the second threshold, it is determined that the trigger source of the touch signal acting on the touch sensor is a conductive liquid.

[0105] In an exemplary embodiment, the first touch signal amount and the second touch signal amount are both greater than 0.

[0106] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0107] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0108] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A touch device, characterized in that, It includes a processor and a touch sensor, and the touch sensor includes 2N electrodes; the 2N electrodes are arranged around a central axis in a preset direction; the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver; the emitter and the receiver are respectively connected to the processor; N is an integer greater than 1; The processor is configured to generate a coding signal; The processor is further configured to input the coding signal to the emitter in a first stage, detect the output signal of the receiver, and obtain a first touch signal quantity; The processor is further configured to input the coding signal to the emitter and / or the receiver in a second stage, detect the output signal of a reference electrode, and obtain a second touch signal quantity; the first stage and the second stage belong to different stages of a detection period of the touch sensor; The processor is further configured to determine a trigger source of a touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

2. The device according to claim 1, wherein The 2N electrodes form a circular pattern or an oval pattern.

3. The device according to claim 1, characterized in that, The 2N electrodes are evenly arranged around a central axis in a preset direction.

4. The device according to claim 1, characterized in that, The distance between adjacent electrodes is the same, and the ratio of the distance to the diameter of the touch sensor is 0.05 to 0.

15.

5. The device according to claim 1, characterized in that, The N is 2.

6. The device according to claim 1, characterized in that, The touch sensor further includes a circuit board and a packaging layer; the 2N electrodes are located between the circuit board and the packaging layer.

7. A touch signal detection method, characterized in that, The method is applied to a touch device, and the touch device includes a touch sensor, and the touch sensor includes 2N electrodes; the 2N electrodes are arranged around a central axis in a preset direction; the electrodes separated by one electrode among the 2N electrodes are connected to each other to form an emitter and a receiver; N is an integer greater than 1; the method includes: Generating a coding signal; Inputting the coding signal to the emitter in a first stage, detecting the output signal of the receiver, and obtaining a first touch signal quantity; Inputting the coding signal to the emitter and / or the receiver in a second stage, detecting the output signal of a reference electrode, and obtaining a second touch signal quantity; the first stage and the second stage belong to different stages of a detection period of the touch sensor; Determining a trigger source of a touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

8. The method according to claim 7, characterized in that The determining a trigger source of a touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity includes: When the first touch signal quantity is greater than the second touch signal quantity, determining that the trigger source of the touch signal acting on the touch sensor includes a human body; When the first touch signal quantity is less than the second touch signal quantity, determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid.

9. The method according to claim 8, wherein The when the first touch signal quantity is greater than the second touch signal quantity, determining that the trigger source of the touch signal acting on the touch sensor includes a human body includes: When the first touch signal amount is greater than the second touch signal amount, and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to a first threshold, it is determined that the trigger source of the touch signal acting on the touch sensor includes a human body; When the first touch signal amount is less than the second touch signal amount, determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid includes: When the first touch signal amount is less than the second touch signal amount, and the absolute value of the difference between the first touch signal amount and the second touch signal amount is greater than or equal to a second threshold, it is determined that the trigger source of the touch signal acting on the touch sensor is a conductive liquid.

10. The method according to claim 7, characterized in that, The first touch signal amount and the second touch signal amount are both greater than 0.

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